For the last decade-plus, Houston-bred Z-Ro has exemplified the work ethic and musical output that has become synonymous with a certain class of Southern spitters. Since the turn of the century, the tune-carrying rapper has released more than a dozen albums and a similar number of mixtapes, cementing himself as a stalwart in H-Town music but rarely transcending the oft-self-contained city’s scene to earn national recognition. Now, a little more than a year after dropping his last album, the Rap-a-Lot representer returns with Meth. The fourth in a series of drug-titled albums (following Crack, Cocaine and Heroin the last three ...